The Power of Staying in the Market

Studies consistently show that individual investors earn significantly less than the indices they're trading. The main culprit isn't fees or bad stock picks — it's behavior. Investors buy after prices have risen, sell after they've fallen, and miss the handful of days each year that account for most of the market's gains.

A 2024 DALBAR study found that over 20 years, the average equity investor earned about half the return of the S&P 500 — not because they held bad stocks, but because they moved in and out at the wrong times.

The simplest antidote is also the hardest to execute: buy a broad index, hold it for years, and ignore the noise. That's it. But it helps to understand why it works — and what the historical data actually shows.

Most people understand that investing early is better than investing late. Fewer people have an intuition for how much better. The reason is that compounding is exponential — the longer your time horizon, the steeper the curve.

A 7% annual return doubles your money in about 10 years. It turns $10,000 into $38,000 in 20 years, and $76,000 in 30 years. The same 7%, applied to the same $10,000 starting balance, produces wildly different outcomes depending purely on how long you hold.

The S&P 500 has historically delivered well above that benchmark over long horizons. The charts below show you the actual numbers.

The horizontal axis is time. The vertical axis is the dollar value of your investment. Each point represents a rolling window: the value you'd have on that date if you had invested exactly N years earlier.

Notice a few things:

• Even investors who bought at peak valuations (2000, 2007, 2021) eventually recovered — and surpassed — their original investment in the S&P 500 if they held long enough.
• Increasing the holding period shrinks the range of bad outcomes. At 5 years, some windows ended in the red. At 15+ years, nearly all historical windows were profitable.

The data doesn't tell you when to invest — trying to time the market is exactly the behavior that causes underperformance. What it does tell you is that staying invested across full market cycles has historically been rewarding, even if you had the bad luck of buying at a peak.

A few principles that hold up across the historical data:

1. Time horizon matters more than entry price. The longer you can stay invested, the less it matters exactly when you started.
2. Drawdowns are temporary, but missing the recovery is permanent.Selling during a crash locks in losses and often means missing the fastest rebounds.
3. Broad diversification absorbs individual failures. The S&P 500 holds 500 companies. Even when some collapse, the index recovers because new companies enter and grow.

This is educational content based on historical data. Past performance does not guarantee future results. Nothing here constitutes financial advice. Read the full disclaimer.